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Sandfire in Botswana is WhyAfrica’s Pick Of The Week

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It seems that all exploration roads in Botswana is leading to the KCB. Sandfire has recently announced good drilling results from its A1 prospect. Image credit: Leon Louw for WhyAfrica

Sandfire in Botswana is WhyAfrica’s Pick Of The Week

Following hot on the heels of ASX listed Sandfire Resources’ recent announcement that it will spend close to USD72-million on expansions at its existing Motheo copper project in Botswana, the company this week released encouraging results from its nearby A1 copper silver prospect.    

Sandfire is drilling for copper/silver (Cu-Ag) 20km northeast of Motheo in the Kalahari Copper Belt (KCB).      

According to a statement by Sandfire drilling has demonstrated the presence of mineralisation over a strike extent of at least 1.8km, trending northeast-southwest along the A1 Dome.

“Importantly, the mineralisation intersected in the 200m spaced drilling completed to date remains open to the north-east, and up and down-dip. The copper-silver mineralisation at A1 is interpreted to be hosted in a thrust-related vein system, located near-surface at the centre of a periclinal anticline within the D’Kar Formation, a similar geological setting to the T3 and A4 Deposits.

“The area has been a high-priority exploration target since being identified by an airborne electromagnetic (AEM) survey in 2017.

“Early reconnaissance drilling by MOD Resources between 2018 and 2019 identified both vein-hosted mineralisation within the D’Kar Formation, and contact-hosted mineralisation between the D’Kar and Ngwako Pan Formations (NPF), two styles of mineralisation seen at the T3 and A4 Domes.

“Of the seven holes drilled by MOD, only two reached the NPF contact, with both returning +2% Cu intersections.”

More drilling holes completed

Sandfire has now completed 18 diamond (DD) and 17 Reverse Circulation (RC) drill-holes at the A1 prospect, concentrated along the crest of the A1 Dome.

Two of these DD holes were drilled to the north-east, targeting different structural domains along the southern limb of the A1 Dome. Assays have been received for the first 14 DD and 11 RC holes, with the remaining results expected in early November. These results demonstrate a mineralised strike extent of at least 1.8km, trending northeast-southwest, along the A1 Dome.

Drilling so far has been concentrated to the south-west of the dome, expanding on the early results generated by MOD’s reconnaissance drilling. The newly defined A1 copper-silver mineralisation remains open to the north-east along strike, and up- and down-dip, with ~4km of the A1 Dome remaining untested to the north-east.

Like the mineralisation at the T3 and A4 Deposits, the structurally controlled A1 copper-silver mineralisation is shallow and interpretation of the results available to date suggests further similarities with the T3 and A4 Deposits.

AGG survey on the cards (Sandfire in Botswana is WhyAfrica’s Pick Of The Week )

Regional exploration activities have continued elsewhere across Sandfire’s KCB Project.

A range of regional and prospect-scale geophysical surveys have been undertaken in 2022, to generate new target areas and refine existing targets for further exploration drilling. These include high-resolution Airborne Magnetics (AMag), IP and Down-hole Electromagnetic surveys (DHEM).

Sandfire is planning an Airborne Gravity Gradiometry (AGG) survey across its entire exploration tenure, the first of its kind to be undertaken in the KCB.

This survey, due to commence in November, will represent the single largest geophysical dataset acquired by the company to date. The AGG survey will provide a high-resolution understanding of density contrasts within the KCB, allowing for detailed mapping of basement architecture and enhanced target generation and testing at regional to prospect scales.

An Environmental Management Plan (EMP) has recently been granted covering prospecting licences in the Ngamiland area, about 50km north-east of the Motheo Expansion Project.

This will allow Sandfire to commence exploration activities at several high-priority target areas north of Khoemacau Copper Mining’s licences and copper deposits.

Two additional EMP applications are in progress to permit the remaining three prospecting licences without EMP coverage.

Soil sampling teams remain active across the company’s prospecting licences and are continuing to define anomalies at locations that are of interest to the company.

Preliminary drill testing has also been undertaken around known mineralisation at the T23 prospect and at the Okwa Project, about 85km north and 140km south of Ghanzi respectively.

Sandfire in Botswana is WhyAfrica’s Pick Of The Week

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Sandfire in Botswana is WhyAfrica’s Pick Of The Week

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